PhidgetInterfaceKit 8/8/8

Transcription

1 PhidgetInterfaceKit 8/8/8 Operating Systems: Windows 2000/XP/Vista, Windows CE, Linux, and Mac OS X Application Programming Interfaces (APIs): Visual Basic, VB.NET, C, C++, C#, Flash 9, Flex, Java, LabVIEW, and Matlab Examples: You will find program examples in the download section of _0_Product_Manual created: 10/12/07 Page 1

2 What Can the PhidgetInterfaceKit 8/8/8 Do? The PhidgetInterfaceKit 8/8/8 allows you to connect devices to any of 8 analog inputs, 8 digital inputs and 8 digital outputs. It provides a generic, convenient way to interface your PC with various devices. Analog inputs They are used to measure continuous quantities, such as temperature, humidity, position, pressure, etc. Phidgets offers a wide variety of sensors that can be plugged directly into the board using the cable included with the sensor. Here is a list of sensors currently available: IR Distance Sensor IR Reflective Sensor Vibration Sensor Light Sensor Force Sensor Humidity Sensor Temperature Sensor Magnetic Sensor Rotation Sensor Voltage Divider Touch Sensor Motion Sensor Mini Joy-Stick Pressure Sensor Voltage Sensor Current Sensor Slide Sensor 1018_0_Product_Manual created: 10/12/07 Page 2

3 Non Phidgets Sensors In addition to Phidgets sensors, any sensor that returns a signal between 0 and 5 volts can be easily interfaced. Here is a list of interesting sensors that can be used with the PhidgetInterfaceKit 8/8/8. Note: these sensors are not plug & play like Phidgets sensors. Manufacturer Part Number Description MSI Sensors FC21/FC22 Load cells - measure up to 100lbs of force Humirel HTM2500VB Humidity sensors Measurement Specialties MSP-300 Pressure sensors - ranges up to 10,000 PSI Freescale Semiconductor MPXA/MPXH Gas Pressure Sensors Allegro ACS7 series Current Sensors - ranges up to 200 Amps Allegro A1300 series Linear Hall Effect Sensors - to detect magnetic fields Analog TMP35 TMP36 Temperature Sensor TMP37 Panasonic AMN series Motion Sensors Note: Most of the above sensors can be bought at Digital Inputs Digital Inputs can be used to convey the state of push buttons, limit switches, relays (check out our Dual Relay Board), logic levels, etc... Digital Outputs Digital Outputs can be used to drive LEDs, solid state relays (have a look at our SSR board), transistors; in fact, anything that will accept a CMOS signal. Digital outputs can be used to control devices that accept a +5V control signal. With transistors and some electronics experience, other devices can be controlled, such as buzzers, lights, larger LEDs, relays. 1018_0_Product_Manual created: 10/12/07 Page 3

4 Getting Started Installing the hardware The kit contains: A PhidgetInterfaceKit 8/8/8 A USB Cable You will also need: A piece of wire to test the digital inputs An LED to test the digital outputs An Analog Sensor to test the analog inputs Connect the Analog Sensor to any of the analog input ports (labeled 0 to 7) using a Phidgets sensor cable. 2. Connect the InterfaceKit board to the PC using the USB cable. 3. Connect one end of the wire to a digital input port and the other end to the ground connection. 4. Connect the LED to one of the digital output by inserting the long LED wire into any of the digital outputs (labeled 0 to 7) and the shorter wire to Ground. 1018_0_Product_Manual created: 10/12/07 Page 4

5 Download and Install the software Go to >> downloads Select your operating system (Windows, Linux, MAC OS) Select the language you want to use and download the appropriate examples and Libraries. Install the Libraries and decompress the Example file. Testing the PhidgetInterfaceKit 8/8/8 using Windows Note that some examples are not available for Linux, Mac OSX or Windows CE. Make sure that you have installed the libraries and decompressed your example file. Run the program Manager-full to make sure that the PhidgetInterfaceKit is properly connected to your PC. 1018_0_Product_Manual created: 10/12/07 Page 5

6 Run the program InterfaceKit- full and check that the box labelled Attached contains the word True Test the digital output by clicking on the box to turn on the LED. Clicking again will turn the LED off. Test the digital input by disconnecting the wire end connected to the digital input. connector. The tick mark in the box will go away. Test the analog input sensor by observing the sensor value as you activate the Phidget sensor. You can adjust the input sensitivity by moving the slider pointer. 1018_0_Product_Manual created: 10/12/07 Page 6

7 Programming a Phidget Where to get information Go to >> downloads Select the Operating System and the language you want to use. Download the appropriate API manual and read the section under the InterfaceKit heading. Have a look at the source code of the InterfaceKit-full program. Have a look at the C# example below. Modify an existing program or write your own program from scratch. Simple example written in C# // - InterfaceKit simple - // This simple example creates an Interfacekit object, hooks the event handlers, and // opens it for connections to IntefaceKit Phidgets. It will then wait for user input to // terminate, and in the meantime, display event generated data from the InterfaceKit. // For a more detailed example, please see the InterfaceKit-full example. // // Please note that this example was designed to work with only one Phidget InterfaceKit // connected. For an example using multiple Phidget InterfaceKits, please see a // multiple example in the InterfaceKit Examples folder. // // Copyright 2007 Phidgets Inc. All rights reserved. using System; using System.Collections.Generic; using System.Text; using Phidgets; //needed for the interfacekit class and the phidget exception class using Phidgets.Events; //needed for the event handling classes namespace InterfaceKit_simple class Program //Declare an InterfaceKit object static InterfaceKit ifkit; static void Main(string[] args) try //Initialize the InterfaceKit object ifkit = new InterfaceKit(); //Hook the basica event handlers ifkit.attach += new AttachEventHandler(ifKit_Attach); ifkit.detach += new DetachEventHandler(ifKit_Detach); ifkit.error += new ErrorEventHandler(ifKit_Error); //Hook the phidget spcific event handlers ifkit.inputchange += new InputChangeEventHandler(ifKit_InputChange); ifkit.outputchange += new OutputChangeEventHandler(ifKit_OutputChange); ifkit.sensorchange += new SensorChangeEventHandler(ifKit_SensorChange); //Open the object for device connections ifkit.open(); //Wait for an InterfaceKit phidget to be attached Console.WriteLine( Waiting for InterfaceKit to be attached... ); 1018_0_Product_Manual created: 10/12/07 Page 7

8 ifkit.waitforattachment(); //Wait for input so we can wait & watch for some event data from phidget Console.WriteLine( Press any key to end... ); Console.Read(); //User input was rad so we ll terminate the program, so close the object ifkit.close(); //set the object to null to get it out of memory ifkit = null; //If no expcetions where thrown at this point it is safe to end program Console.WriteLine( ok ); catch (PhidgetException ex) Console.WriteLine(ex.Description); //Attach event handler...display serial of attached InterfaceKit to the console static void ifkit_attach(object sender, AttachEventArgs e) Console.WriteLine( InterfaceKit 0 attached!, e.device.serialnumber.tostring()); //Detach event handler...display serial of detached InterfaceKit to the console static void ifkit_detach(object sender, DetachEventArgs e) Console.WriteLine( InterfaceKit 0 detached!, e.device.serialnumber.tostring()); //Error event handler...display the error description to the console static void ifkit_error(object sender, ErrorEventArgs e) Console.WriteLine(e.Description); //Input Change event handler...display input index and new value to the console static void ifkit_inputchange(object sender, InputChangeEventArgs e) Console.WriteLine( Input index 0 value (1), e.index, e.value.tostring()); //Output change event handler...display output index and new value to the console static void ifkit_outputchange(object sender, OutputChangeEventArgs e) Console.WriteLine( Output index 0 value 0, e.index, e.value.tostring()); //Sensor Change event handler...display sensor index and new value to the console static void ifkit_sensorchange(object sender, SensorChangeEventArgs e) Console.WriteLine( Sensor index 0 value 1, e.index, e.value); Learning more... check out the forums check out the Phidgets projects 1018_0_Product_Manual created: 10/12/07 Page 8

9 Technical Section Using the Analog Inputs The Analog Input can measure a voltage between 0V and 5V. The analog measurement is represented in the software as a value between 0 and 1000, so a sensor value of 1 unit represents a voltage of approximately 5 millivolts. Each analog input uses a 3-pin, inch pitch locking connector. Pictured here is a plug with the connections labeled. If this is wired backwards, damage to your sensor may result. The Interface Kit provides + 5VDC, ground, and an analog input with a range of 0 to 5V. Ratiometric Sensors If you are using a sensor whose output changes linearly with variations in the sensor s supply voltage level, it is said to be ratiometric. Most of the sensors sold by Phidgets are ratiometric (this is specified in the manual for each sensor). If the analog sensors you are using are ratiometric, enable the ratiometric property in software. This causes the reference to the internal Analog to Digital Converter to be set to the power supply voltage level. If ratiometric is not enabled, the ADC reference is set to a 5.0V 0.5% stable voltage reference. User Phidget V+ Using the Digital Inputs To wire a switch to a digital 15KΩ input, connect the switch between an input, labeled 0 to 7, and a provided ground, labeled G. The default state of the Digital Input in software is False (the switch state is open and the input pin is pulled to 5V by an internal resistor). When the switch is closed, the input pin is pulled to ground and the Digital Input is set to True. INPUT GROUND 15KΩ Digital Input Diagram 1018_0_Product_Manual created: 10/12/07 Page 9

10 Using the Digital Outputs Phidget Connecting an LED or other circuit to V+ a digital output is simple. In the case of an LED, wire the anode to a digital output labeled 0 to 7 on the Interface Kit, and the cathode to a supplied ground, labeled G. 300Ω The 300 ohm resistance is internal to the PhidgetInterfaceKit 8/8/8, and limits the current that can flow through the output. This is intended to protect the device from being damaged if there is a short to ground or if an LED is used. The output is intended to drive TTL or CMOS inputs; it is not designed to provide power to an external circuit. OUTPUT GROUND Digital Output Diagram The digital outputs can be used to switch larger electrical currents and voltages using devices such as power transistors, or logic level MOSFETs. You can also use the 3051 or 3052 to control a larger load. User Mechanical Drawing 1:1 scale 1018_0_Product_Manual created: 10/12/07 Page 10

11 Device Specifications Analog Input Impedance Digital Output Series Resistance Digital Input Pull-Up Resistance 900K ohms 300 ohms 15K ohms Analog Input Update Rate Digital Output Update Rate Digital Input Update Rate ~65 samples / second ~125 samples / second ~125 samples / second Digital Input Recommended Wire Size Digital Output Recommended Wire Size Digital Input Wire Stripping AWG AWG 5-6mm strip USB-Power Current Specification Quiescent Current Consumption Available External Current (source) Max 500mA 13mA 487mA Cable and Connector Components for Analog Inputs Manufacturer Part Number Description Molex Position Cable Connector Molex Wire Crimp Insert for Cable Connector Molex Position Vertical PCB Connector Molex Position Right-Angle PCB Connector (Gold) Molex Position Right-Angle PCB Connector (Tin) Molex Position Right-Angle PCB Connector - Surface Mount Note: Most of the above components can be bought at Product History Date Product Revision Comment July _0 Product Release 1018_0_Product_Manual created: 10/12/07 Page 11